Astronomers using NASA’s Hubble Space Telescope have measured the rotation rate of an extreme exoplanet by observing the varied brightness in its atmosphere. This is the first measurement of the ...

A planet's year length depends on its distance from the Sun. Planets closer to the Sun have shorter years. A planet's rotation speed is unrelated to its year length. Planets' orbital speeds vary ...

Astronomers have captured the first-ever spin measurements of HR 8799, the famed system that made history as the very first exoplanetary system to have its image taken. Discovered in 2008 by two ...

Feel like getting the heck outta town? Enjoy a soothing and thought-provoking rendezvous with the planet Jupiter in this amazing video made from more than 1,000 images taken by 91 amateur astronomers ...

"It's amazing to me that, after years of tracking Jupiter's clouds and winds from numerous observatories, we still have more to learn." When you purchase through links on our site, we may earn an ...